Visual Builder multiple project

Summary:

we are 3 devs , each dev have their own project, each dev deals with different objects. the problem that we encounter, when some dev tried to publish their change lets say dev#1 is working on account, dev#2 is working on activity and dev#3 is working on sales lead, when dev#1 tried to publish his changed, the change made by dev#2 is being wiped out. just wondering how we can prevent this?

we tried to pull from main git but we are not getting the previous changed published by other dev.

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